* Wal-Mart shares rose more than 1 percent in premarket trade to $51.25.

* S&P 500 futures were up 12.20 points, or 1.22 percent, and above fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures was up 106 points, or 1.14 percent, and Nasdaq 100 futures gained 17.75 points or 1.1 percent.

A white Fiat van rammed into pedestrians outside enjoying a late afternoon stroll on Las Ramblas in Barcelona on Thursday killing at least 13 people and leaving hundreds injured. The Islamic State group claimed responsibility for the attack.